Gymnosporangium globosum. [Descriptions of Fungi and Bacteria].
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Abstract A description is provided for Gymnosporangium globosum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia chiefly on hawthorn (Crataegus), also on apple (Malus sylvestris) and other Malus spp., pear (Pyrus communis) and Sorbus. Telia on Juniperus virginiana and related species of the 'sabina' group. DISEASE: American hawthorn rust. Aecia chiefly on the leaves, rare on fruit. Telia perennial on globoid stem galls on juniper. GEOGRAPHICAL DISTRIBUTION: Widespread in eastern states of Canada and the USA. Also recorded in Alaska (CMI Map 123, ed. 2, 1975).